Through systematic study on nine kinds, fifty-three characteristics of Larix Gmelinii from sixteen provenances and thirteen experiment plantation, three ecological forestation regions have been made in the growth range of Larix Gmelinii; They are the low productive regions with lower temperature and humidity in northeast part of the Great Xingan Mountains (including Manguo, Kudur and Merdaoga): the transition region with middle temperature and humidity at the Great Xingan Mountains and the Les- ser Xingan M...